Here is a very little light brown porcelain insulator. I believe it is a U-39. It is stamped on top with the recessed letters "F.M. Locke / Victor N.Y."

This small Locke is one of a few interesting porcelain pieces I was lucky enough to have in my possession for just a few days before delivering them to their new owner. I liked them so much, I decided to photograph some of them and post them for reference.